Wuxia Crossover: I Made Up a Cultivation Technique, and My Disciple Really Mastered It

I can say the most casual thing, and some foolish child will take me for an "immortal." No matter how I explain it, the silly child just won't believe me. What can I do? Faced with gifts from my foolish disciple, I can only admit through tears that I really am an "immortal." But what should I teach her? What would be good to teach her? What a headache~